The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 2019
Filed:
Oct. 31, 2016
Inventio Ag, Hergiswil, CH;
Om Prakash, Viman Nagar Pune, IN;
INVENTIO AG, Hergiswil NW, CH;
Abstract
A apparatus and method for operating an electromagnetic elevator brake during a mains power disruption or emergency stop includes the steps of providing an uninterruptible power supply in a power circuit arranged in parallel to a brake coil and repeatedly opening and closing the power circuit during the mains power disruption or emergency stop. In comparison to the conventional braking during power disruption, the periodic or staggered braking provided by repeatedly opening and closing the power circuit greatly extends the time taken to bring the elevator to a halt. Accordingly, passengers will feel less discomfort when the elevator is braked automatically during power disruption.